Calendar of Events

Listed below is a calendar of events showing significant dates for Earnings Conference Calls, Dividends Payment Dates, and Record Dates. For more information, contact Investor Relations at 920-433-1050.

Date 2008 Events
02/19/2008 Earnings Release - Fourth Quarter 2007 (after market closes)
02/20/2008 Earnings Conference Call - Fourth Quarter 2007 (10:30 a.m. CST)
02/27/2008 Ex-Dividend Date *
02/29/2008 Record Date *
03/20/2008 Dividend Payment Date *
05/07/2008 Earnings Release - First Quarter 2008 (after market closes)
05/08/2008 Earnings Conference Call - First Quarter 2008 (8:00 a.m. CDT)
05/15/2008 Annual Meeting of Shareholders - Chicago
05/28/2008 Ex-Dividend Date *
05/30/2008 Record Date *
06/20/2008 Dividend Payment Date *
08/06/2008 Earnings Release - Second Quarter 2008 (after market closes)
08/07/2008 Earnings Conference Call - Second Quarter 2008 (8:00 a.m. CDT)
08/27/2008 Ex-Dividend Date *
08/29/2008 Record Date *
09/20/2008 Dividend Payment Date *
11/05/2008 Earnings Release - Third Quarter 2008 (after market closes)
11/06/2008 Earnings Conference Call - Third Quarter 2008 (8:00 a.m. CST)
11/24/2008 Ex-Dividend Date *
11/26/2008 Record Date *
12/20/2008 Dividend Payment Date *

* Subject to dividend approval by the Board of Directors

For more information, contact Investor Relations at 800-228-6888.

Last updated: 01/31/08